2019-590-E AMS - High Performance Building Solutions Link assessment

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DocuSign Envelope ID:2560017F-D6E8-4CA4-8F6F-11521994BEAA High Performance Building Solutions - www.hpb-solutions.com Main Office: • 7415 Folger Drive, Charlotte, NC 28226• (704)299-1698 Building Solutions Durham Office: • 705 Watts Street, Durham, NC 27701 • (919)632-3595 Orange County Building Envelope Assessment Proposal August 20, 2019 By: Francis Conlin, PE Building Science Engineer High Performance Building Solutions (HPBS) 705 Watts Street, Durham, NC 27701 fconlin@hpb-solutions.com (919) 632-3595 For: Steven A. Arndt, MBA, CFM Asset Management Services Director Orange County Government Office: 919-245-2658 Cell: 919-612-6565 Background High Performance Building Solutions (HPBS) conducted a limited paper review of a Remediation Project Manual dated August 12, 2019 that included a moisture & mold assessment report conducted in January 2019 and remediation specifications for the Orange County John Link Government Services Center building located at 200 S Cameron Street in Hillsborough. This building has experienced reports of musty odors and visible evidence of moisture intrusion particularly in the negative return plenum above the ceiling tiles. The anticipated cost of the remediation scope has escalated to the level that it is prudent to have a second opinion of the root cause of the moisture intrusion and the remediation scope. The current moisture and mols assessment is based upon a non-invasive visual assessment of moisture, and on surface and air samples collected in January 2019 which were assessed for levels of mold. • One concern is that the January mold assessment report noted that "the air samples showed healthy indoor air measurements in all of the rooms and also above the dropped ceilings". The January mold assessment report did identify higher levels in surface samples; however, surface samples are neither a good indicator of contaminant levels nor are they a useful diagnostic tool. • In addition, the January report identifies that the water intrusion issue is likely due to deterioration of the grout at two bands extending the exterior of the building. The "likely" qualifier does not demonstrate that the dynamics of the moisture problem are well understood. The most important task of a remediation is to understand and correct the source of moisture, otherwise the problem will likely return after remediation.